package com.example.config;

import org.springframework.web.servlet.HandlerInterceptor;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;

//自定义拦截器，权限控制
public class LoginHandlerInterceptor implements HandlerInterceptor {
    @Override
    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws ServletException, IOException {
        //获取session域中的用户名
        Object loginUser = request.getSession().getAttribute("loginUser");
        if (loginUser == null) {    //如果没有登录
            request.setAttribute("msg", "没有权限，请先登录");
            //请求转发
            request.getRequestDispatcher("/index.html").forward(request, response);
            return false;
        } else {
            return true;
        }
    }
}
